feat: add scoped history and artifacts

src/routes/chatStreamRoute.ts

@@ -181,8 +181,8 @@ const toLegacyMessages = (messages: UIMessage[]) =>
     ];
   });
 
-const createFallbackUserUiMessage = (content: string): UIMessage => ({
-  id: `user-${Date.now().toString(36)}`,
+const createFallbackUserUiMessage = (content: string, id?: string): UIMessage => ({
+  id: id ?? `user-${randomUUID()}`,
   role: "user",
   parts: [{ type: "text", text: content }],
 });
@@ -326,6 +326,9 @@ export const registerChatStreamRoute = (
         });
         return;
       }
+      if (input.tjwater.topic_id && !await sessionMetadataStore.topics.get(authContext, input.tjwater.topic_id)) {
+        res.status(404).json({ message: "主题不存在" }); return;
+      }
       const requestedSessionId = resolveRequestedStreamSessionId({
         sessionId: parsed.data.session_id,
         promptText,
@@ -403,6 +406,7 @@ export const registerChatStreamRoute = (
           projectId,
           projectKey,
           sessionId: binding.sessionId,
+          topicId: existingSessionRecord?.topicId ?? input.tjwater.topic_id,
           userId,
         });
       const activeSessionRecord = await sessionMetadataStore.touch(ensuredSessionRecord);
@@ -454,6 +458,10 @@ export const registerChatStreamRoute = (
         toSessionUiStateContext(activeSessionRecord),
       );
       const persistedUiMessages = toUiMessages(initialSessionState?.messages);
+      if (input.tjwater.client_message_id && persistedUiMessages.some((message) => message.id === input.tjwater.client_message_id)) {
+        res.status(409).json({ message: "client_message_id already exists in this conversation" });
+        return;
+      }
       let executionPlanHistory = initialSessionState?.executionPlans ?? readExecutionPlans(initialSessionState?.messages ?? []);
       const visiblePersistedMessages = sessionPurpose === "task_collaboration"
         ? toCollaborationMessages(persistedUiMessages)
@@ -466,7 +474,7 @@ export const registerChatStreamRoute = (
           ? visibleRequestMessages
           : [
               ...visiblePersistedMessages,
-              createFallbackUserUiMessage(promptText),
+              createFallbackUserUiMessage(promptText, input.tjwater.client_message_id),
             ];
       let latestUiMessages = requestMessages;
       const baseMessages = toLegacyMessages(requestMessages);